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IPv6 unlabeled routes are exchanged through the external MP-BGP session between

ASBR 1 and ASBR 2. Interdomain MPLS tunnels spanning multiple ASs are not supported.

Configuring IPv6 Tunneling over IPv4 MPLS

To configure IPv6 tunneling over MPLS:

1. On PE 1, configure both an IPv4 and an IPv6 interface toward the CE router. Use an

IPv4-compatible IPv6 address.

host1(config)#interface atm2/0.1

host1(config)#atm pvc 1 0 1 aal5snap

host1(config)#ip address 11.19.1.1 255.255.255.0

host1(config)#ipv6 address ::11.19.1.1/126

2. On PE 1, configure an IPv4 interface facing the core.

NOTE: For forwarding to work, you must configure at least one IPv6 interface on each

line module where MPLS-encapsulated IPv6 traffic is expected. You can easily

accomplish this by also configuring an IPv6 address on the core-facing interface.

host1(config)#interface atm3/0.1

host1(config)#atm pvc 30 0 30 aal5snap

host1(config)#ip address 10.10.10.1 255.255.255.0

host1(config)#ip address ::10.10.10.1/120

3. On PE 1, configure a loopback interface.

host1(config)#interface loopback 1

host1(config)#ip address 1.1.1.1 255.255.255.0

4. On PE 1, configure an IPv4 IGP and an MPLS signaling protocol in the core.

5. On PE 1, set up a base tunnel, or verify that one exists between the loopback addresses

on the PE routers.

6. On PE 1, configure MP-BGP.

a. Enable BGP.

host1(config)#router bgp 100

b. Configure the MP-BGP CE and PE neighbors.

host1(config-router)#neighbor 11.19.1.2 remote-as 65000

host1(config-router)#neighbor 2.2.2.2 remote-as 100

c. Activate the neighbors in the IPv6 address-family.

host1(config-router)#address-family ipv6 unicast

host1(config-router-af)#neighbor 11.19.1.2 activate

host1(config-router-af)#neighbor 2.2.2.2 activate

d. Configure the MP-BGP PE neighbor to send labeled IPv6 prefixes.

host1(config-router-af)#neighbor 2.2.2.2 send-label

host1(config-router-af)#neighbor 2.2.2.2 update-source loopback 1

host1(config-router-af)#neighbor 2.2.2.2 next-hop-self

host1(config-router-af)#exit-address-family

JunosE 11.2.x BGP and MPLS Configuration Guide

Juniper JUNOSE 11.2.X BGP AND MPLS User Manual

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